I had little trouble finding 38 Super on line,although I had a much harder time locally-only one dealer really had any and he sold me all of it.He didn't get any demand for it.
When I found it on line,it was $18-$ 21 per box of 50-I dealt with the no shipping charge people whenever I could.Ammoman and Graf.Graf charges a nominal handling charge.
This was for factory ammo.I bought a few thousand plus rounds because I like to shoot it a lot.I also carry it for SD and use it for HD.
A very underrated round.Goes where you point it too